Viewing profile — powderpig

The only benefit I've really made sense of with hybrids is their engine emissions aren't localised to the neighborhood where they're charged overnight. Apart from that, I can't thi…

You should check out the Artemis I engineering footage.

Red Dragon? Falcon 9 Booster 24-hr turn around? The plethora of missed milestones required to land on the moon's surface?

Metro?

I'm only here for the free U2 album. "U2's latest album automatically added to your library"

Conventional jet engines run at RPMs in excess of 20000rpm. To get this same speeds for the same mass flown rates of say a J79 (F4-Phantom) you'd be looking at some massive electri…

Virgin Orbit anyone?

Maintaining a pressure boundary becomes ever more difficult with increase in size, and therefore cost and engineering complexity.

Roughly how many hours did Euan spend to complete this piece of work?

Ever heard of ITAR? As a European I find the US's reluctance to adhere to EU law double standard.

I highly recommend AccuBattery for Android. I have been using it for a few years now and I saw a noticeable difference on my Pixel 3a XL compared to use on previous smart phones. I…

How is China a problem? The way of life and the energy intensity of a single individual living in the developed world is the problem. Do I have to point out the US and Europe? (I l…

This is essentially the Boots Theory, coined my Terry Pratchett. The reason that the rich were so rich, Vimes reasoned, was because they managed to spend less money. Take boots, fo…

When's a good time to stop technology advancement for those of us who are willing to pay for it? There will never be a right time.

There are a number of reasons why it might have failed, fatigue, deviation from process/protocol but pressure vessels are well understood and not the problem here.

The "space" launch was using American technology, nothing about the failure was "British", in my mind. Volt on the other hand...

Worth noting the use of titanium at Mach 3, Mach 3.5, is really at its limit. Any faster and you'll start to see serious problems with thermal management. This pushes you into usin…

And I think this is one of the reasons we are seeing so many companies racing to create a commercially viable eVTOL (electric - vertical take-off & landing) product. To me, this tr…

Like the Russians?

> Is electricity so expensive in some countries that burning fossil fuel for heat is cheaper than using an electrical heat pump? Yes. I can't remember the exact source but this cha…

I think all geo-engineering is a bad idea. The least worse idea is sucking CO2 out of the atmosphere. The consequences of any geo-engineering ideas are not well understood.

I too hate the coloured plots but I can tell you as a Stress & Structures engineer who works with ANSYS regularly, it does help when assessing material limits and strain energies. …

I am afraid I don't have the numbers to back up my claim but when I was at university, my thermodynamics lecturer showed us a calculation that background dose from radioactive mate…